squirrel's picture

Unknown hoverfly

Observed: 5th March 2013 By: squirrelsquirrel’s reputation in Invertebratessquirrel’s reputation in Invertebratessquirrel’s reputation in Invertebratessquirrel’s reputation in Invertebrates
DSC_2470
Description:

thought may be Episyrphus balteatus but markings seem slightly different about 6-8mms

Identifications
Species interactions

No interactions present.

Species with which Hover Fly (Episyrphus balteatus) interacts

Comments

dennis trunecka's picture

Episyrphus balteatus.

As these hoverflies are common in so many places and in so much of the world I would think they were well studied. Does anybody know why E.balteatus sometimes has these lighter bands?

ophrys's picture

Colour

Episyrphus is very prone to dark forms and forms with these lighter bands. According to Stubbs and Falk, temperature during pupal develoment does affect the extent of dark markings. Very late and very early specimens are often very dark, as a result.

Whether these silvery bands are related to temperature or are just natural genetic variation, I am not sure, but you see them commonly.

Ian
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